Molding machine



, G. L. GRIMES MCLDINGY MACHINE Mar. 6, 1923.

5 sheets-sheefi 1 Filed Dec. 27, 1920 wwemtoz elf tonne a. L. G-RIMES Momma MACHINE Mar. 6, 1923,

Filei'd Dec.

2? 1920 5 sheets-sheet E Mar. 6, 1923. 1,4413% 7 s. L. GRIMES MOLDING MACHINE Filed Dec. 27, 1920 5 shee% she 3 Mar. 6, 1923. 1,447,300

' G. L. GRIMES MOLDING MACHINE F-iled Dec 27, 1920 5 sheets-sheet 4 Mar; 6, 1923.

- G. L. GRIMES MOLDING MACHINE Filed 'Dec. 2'7, 1920 5 sheets-sheaf, 5

v to conjipact" the sand about-the pat;

Patented Mar. #8, 19233.,

L. OF DETROIT, MICHIGAN.

nor-n ne MACHINE.

Application filed December 27, 1920. SeriaIN 433,419.

which it pertains to snake and reference being had to the a 1 i drawings. which form a part of th cation. Y v

My invention relatesto molding machines for use in various founders molding operations for producing castin 's.

The principal object ot' this invention is an improvement in the general construetioh and operation of machines of this character.

A further object is to provide ineanst'or eii'ectih e; a preliniinary'joiting oi the flask rn. and also to hold the sand while the flask is turned to an inverted position.

A further objectis to I pro "ide an improved monntingofthe swf t ing; or press:

and which also serves to support the flask while the pattern is removed thereirom, the construction being such that the arms may he swung either into an operatire'position over the flask; or laterally therefrom as required. i l

A .further object llS to provide means whereby the arms may be swung in one"di-' rection only in order that. the .*-.nr-"-not interfere with the oscillation oi the? sine when thellasl: is re neved,

A .l urther object of the invention is to provide,nieans tor adjusting the men'iberto which the swinging cirms are pivoted. nearer to or farther-"from the flask supportingplat- :lorni, to adapt the machine for the reception of fiasks of relatively different heights.

A further object of the invention is to provide an improved bearing for the trunnion of the rotatable frame carrying the flaslrpleti orin andtthe swinging or .pressure arms, whereby it may be oscillated with a minimum. expenditure of power or effort and without lateral; play.

A further object otthe invention istoflproride means whereby the f e 1% carrying. platform,1nay be operated to jolt the sand around the pattcrnto belo'llowed by an upward movement of the flask carrying plat- "e arms against which the flask is forced lFoi-m toward the pressure arms to clampv the bottom and follow boards vupon. the flask, the oscillating frame being thenrev'ersed that the pattern maybe 'removedrfrom. the hash by an upward (opposite) movement of the flask carrying plati oizm;tofiwhich the follow or patternnboard attached.

With the foregoing-and other. objects in riew which will appear as the description proceeds the invention "further iresidesin the combihation and arrangementof parts and inthefidetails-of construction herein after described and claimed, itzbeinghnderstood that changesm'aybe madeinuthe precise embodiment of the invention herein disclosed without departing? from the spirit of the same.

In the accompanying drawings ifo'rming part ofthis specificationz.

Figure l a side elevation .Of-th6;1l1ll chine, withiparts broken away, showing'in dotted linesthe platform raisedutoward the pressure arms, as whenolampingthe' bottom and follow .or pa-tternaboards .nponthe flask preparatory to reversinggthe latter. igure 2 is asideelevati'on of themachine with the platform in .;a n"i-nverted position, showing thelfiask indotted lines restingiupoh the pressure farms, with the follow-board and pattern attached to the platform gbutwithdrawn-from the flask.

-Figure-3 is a (vertical longitud nalcsectional "view of the 'machine withi'theflask supporting platform; -nits lowermost; position, asimFigure 1. j

,Figurei is a plan view of the machine showing the pre'ssurem rms in dotted lines. as they would appear ,when swung toward. one side of the machine.

Figurefi is a i ront elevation o'rfithe machine, v 11- parts broken away and-insectimto more clearly sdi'solose the, constr uc tion of certain Darts ishowin also the means whereby the pressure-arms may be adjusted nearer to orfarther from: 1th fl sksupporting platform as may be requ edto, accommodate the different sizes, of; fiasksxcarried by the latter.

;Figure 6' is aside elevationpof, an automatically operated valve fonthe deli-very v of air to and from-the.cylindenbelow the piston, to provide forboth; the j lting a nd lifting of the fiask. supporting p; atform.

Figure 7; is a cross sectioned View through the automatic valve taken on or abontline 7- 7 of S.

Figure 8 is a cross sectional view of the valve taken at right angles to the preceding view and on or about line of Fig ure 7.

Figure 9 is an inverter plan view of the valve.

Referring now to the letters of reference placed upon the drawings:

A, denotes a main frame or base having a standard A to which is bolted a bearing A to receive the trunnion. B of an oscillating frame B Fitted in the respective ends of the bearing A to receive the trunnion B" are V shaped collars Z), Z), and rolls 5 Z). Letween the end of the journal bearing and the nut 13, and screwed to the end of the trunnion, is a ball-bearing If, to relieve the friction caused by the thrust of the oscillating frame against the end of the bearing.

C, is a flask supporting platform from which rises a U or yoke-shaped frame C to which are bolted beveled cleats C overlapping thebeveled edges 13?, of the oscillating frame 13.

D, is a cylinder supported in the frame B that it may oscillate therewith. D is a piston fitted to the cylinder D. D is a piston rod bolted at its outer end to the U or yoke-shaped frame C that the latter may be forced across the face of the oscillating frame B by the operation of the piston.

E, E, are a pair of swinging pressure arms respectively pivoted to a plate F, bolted as at 7', (see Figure 5) to the oscillating frame B. E is a shoulder on the pivot end of the arms adapted to abut against the frame, to insure the arms swinging only in one direction when not in position over the flask.

The back of the plate F is provided with a plurality of ribs F, adapted to enter a series of corresponding parallel recesses a in the face of the oscillating frame B (see Figure 3) to provide for the adjustment of the pressure arms with reference to the d: supporting platform C, whereby the n chine may be adapted to receive flasks of varying heights.

E denotes a plurality of 1 ustabl e hand-screws desi ned to bear a air J; the

w an u 6 ,-1 board G which carries a flask tr is the usual follow or pattern board bolted to the platform C, to which is secured a pattern G H, denotes an air inlet pipe leading from an air compressor (not shown) to a valve H H indicates a valve for manually controlling the delivery of air to the cylinder D, that the flask may be either jolted to pack the sand around the pattern or lifted preparatory to turning overtlie flask to with draw the pattern as may be required.

H is apipe leading from the valve chamber H through the trunnion B to an auto matically controlled valve in the valve chamber 1 bolted to the oscillating frame B,

a flexible connection H being provided be tween the sections of the pipe H leading through the trunnion and that connected with the valve chamber to permit the pipe flexing when the frame B is oscillated.

l is a pipe also leading from the valve chamber H through the trunnion B to the cylinder D, the latter pipe being also fitted with a flexible pipe or joint 1 it indicates a manually operated lever for rotating the valve H, whereby communication may be established between the inlet pipe ll and the pipe H or between the inlet pipe H and the pipe I as required.

J. is a nine leadin from the )i 3e 1 to a l J. a V

relatively small cylinder J bolted to the main supporting frame. l is a plunger having a rod J adapted to be projected by the pressure of air delivered to the cydin'der into the path of a foot treadle K, pivoted to the main supporting frame.

J is a spring designed to return the plunger J to its initial position upon cutting off the supply of air to the cylinder, whereby the treadle K maybe again operated. The treadle K is connected by alink K with a. bell-crank lever K pivoted in a bracket K secured to the standard of be main supporting frame.

K is a locking bolt pivoted to the hellcrank lever, adapted to enter recesses B, B in the oscillating frame B to lock the latter when rocked from one position of its movement to the other position of its movement and until manually released by the depression of the treadle.

L denotes a rod extending downwardly from the yoke-shaped frame C and movable therewith on which is mounted a roller L adapted to oscillate a valve rod L upon which are mounted opposing cams L, L adapted to be acted upon by the roller L" to alternately reverse the direction ofrotation of the valve disc L upon the lower end of the rod. The valve disc lb is provided with a port L designed to alternately open and close the port Z (shown in Figure 7 and in dotted lines of Figure 9) in the valve chamber that air admitted to the valve (:l12t111- her from the pipe H may pass from said port Z around a peripheral groove or channel m in the plunger valve M, and out through a pipe lrlsee Fig. 7) to the cylindcr D to lift the flask supporting platform.

Upon the roller L carried by the rod L contacting with the other or opposing cam L due to the reverse movement of the rod, air will be admitted through the port Z to the back of the plunger valve M, thereby forcing the plunger valve to the right (see Figure 7) against the action of the spring Z thus cutting-off the admission of air to the valve chamber through the port Z and opening the pipe L that the air delivered to the leasing the-flask supporting cylinder D maybe exhausted ;-thereby refecting a jolting-ofthe sand around the pat-- tern. The valve disc is also provided with a port L which when brought into registration with the port L permits-the air in the valve chamber to-exhaust therethrough that the spring Z may be efiectiveto return the plunger valve M to the position shown in Figure *7.

N, indicates a springto force the valve L to its seat. L is a valve for closing-the exhaust pipe L? that the air-admitted to the cylinderD may lift the platform G whereby the flask carried by the platform maybe "forced against the pressure arms 1), E;+ thereby clampingthe' bottom and follow previousjolting platform being boards upon the fiask,theaction of the flask carrying suspended for thetime by the valve L 1 The valve L is connected by the pipe {L the closure" of to the valve casing at the back end or the alun er M so when the valve-111s closed l b 'there is an equal pressurehat both endear the plunger Maud the spring-Z will return the plunger M to its initial position regardless of the operation ofthetop cam L If desired a handle'L shown in dotted lines in Figure 5, maybe attachedtqthe rod L to rotate therollerL out of the path of the opposing "cams L li the plunger val e will then remainin the position shown the air admitted to the valve,

in Figure 7, I v chamber trom the pipe H passing around the peripheral channel m in the valve plan-- eer M and through the pipe-L to. the cylinder forcing the platform C ivith the/flask, thereon towardithe pressure arms asbefore explained. a I H If this. course is followed it' Will not; be necessary to close the valvejLT' to e'ifect the upward movement of the fiask carrying platform. f

Having indicated the several parts by reference letters the 'constructionand further operation of the device will no be readily understood.

The machine having been brought tothe positionindicatedin Figures 1 andfithe follow board G with the pattern secured thereto is mounted on theipl'atfonn with a flask G properly adjustedjjand' held against displacement in the usual manner.

S and is then placed ithin the flask, and air under pressure admitted to the; cylinder belowthe-pistonD by the adjustment of the valves'H and H as previously indicated the air passing -from the valve 'H throu h the pipes-leadijngyfrom the valve chamber to.-

the automatically cpntrolled valve in the chamber I, whereupon the piston is forced upwardly carrying With -it, the platform C on which the flask is no-unted; -The upward thrust ot the piston rod hav ng raised the platform and efvyoke,-shapedrframe C" the roller L" "on the depending rod L carried by theyoke-shaped frame Will by contact with the cams onthe rod If :osci llatethe latter and thereby operate" the automatic valve as has been heretot'ore described. Through'the operation of the automatic valve the air intheepistoncis exhausted permittingthe platform'zC With i'ts fiask to drop by 'g-ravitycausing the sand-to pack around-the pattern. This op eration isrepeated again'and again until the mold is formed. l/Vhen the mold isc om pletelyrformed theboard G is placed 'upon the flask, the swinging arms E,E, .are then adjusted in position over the flasku and air admitted again to the cylinder; to orce'the platform upwardly carrying" with; it the flask as before. fThevalve L is then 'closed that the'fiaskmay be" brought intocontact with the pressure arms {whereupon the hand-screws E are adjusted to insure perfect contactbettveen and the mold atfallflpoints it beingobvious that air delivered tothe cylindergwill force upwardly the platform C with its flask t b held gin position bythe-pres'sure otjair' in the cylinder the platform -iththefiaskanay be reversed as shown n'Figure f2 through E, E, to clampthe 'bottomand-follow boards. upon the flask,

the board compressing the sand in the latter. The board G covering the" flask belng now i,

the operationof a suitablelroll over mecha-,

jllism (notshown)"described in a co-pending 'aplplication'filed ,byme December 27,1920, it i Serlal No. 433,420+and upon the admission or air-into the cylinder "actuate i w 5 The flask. is then removed from thefpressu m 1 hat the esqil ns a e ats nit al pos t on to ,I'GCGlVG be returned to T .lClillIIllSI .Having hus' described my invention What 1. In a molding niach'ineu an oscillating frame, a said frame.- 'and'adaptedjto oscillate therewith, a flaslrf for mold carrying platfor-m tormi ig a unime sar frame, a cylinder supported the yoke-shaped i'raineslidable on my pa ff th yekes ar ii a v. 0 n, .sliclablegln hecjvlinder, illlClcol-lnectfid Qw ltlithe yokeshaped-i frame, laterally swinging arms atlikhtedtobear upon thecover fot the flask or; moldgand adjustably mounted "andmsan fo seen t la ies ram .7 admit-tine air. under :Pressure to the cylinder to actuatejtheifiask or mold carryingplatjfornnuvhereby the f,cove-r,- plate ;maybe ,clarirped in position or the patternwvvithdrawn from the flask; 7 2,111 a. molding- .Inachine,j,an oscillating framehavingr beveled side ivallsfa'[cylinder supported"bythe frame, beveled cleats bolted 1 30 and means for &

to the yoke-shaped frame and overlapping the beveled side walls of the oscillating frame, whereby the yoke shaped frame may slide upon the first named frame and oscillate therewith, a mold or flask supporting platform fo hung a unitary part of the yoke-shaped frame, a piston slidable in the cylinder and connected with the yokeshaped frame, a member adjustably secured to the oscillating frame, a pair of laterally swinging arms pivoted to said member adapted to bear-upon the cover of the flask or mold, and means for admitting air under pressure to the cylinder to actuate the flask or mold carrying platform.

In a molding machine, an oscillating frame. a yoke-shaped frame slidably con nected with the oscillating frame having a flash or mold supporting platform forming a unitary part thereof, apair of laterally swinging arms adapted to bear upon the cover of the flask or mold. and adjustably mounted upon the oscillating frame with reference to the plane of the mold, a cylinder supported by the oscillating frame beneath the yoke of the mold supporting platform having a slidable piston connected with the yoke, and means for admitting air to said cylinder under pressure.

4t. In a molding machine, an oscillating frame. a yoke-shaped frame slidably connected with the oscillatin frame that it may swing therewith, a. mold supporting platform forming a unitary part of the yokeshaped frame, an adjustable member bolted to the oscillating frame having a plurality of narallel ribs adapted to enter corresponding recesses in said oscillating frame, a pair of laterally swinging arms pivoted to the adjustable member, a cylinder supported by the oscillating frame beneath the yoke of the mold supporting platform having a slidable piston connected with the yoke. and means for admitting air into said cylinder under pressure to actuate the platform.

5'. In a molding machine, an oscillating frame, a mold supporting platform slidably connected with the oscillating frame, a pair of laterally swinging arms pivotally connected with the oscillating frame, means for limiting the lateral movement of said swinging arms toward one side of the machine,

actuating the mold supporting platform, whereby the cover plate of the flask may be clamped in position and the pattern withdrawn from the flask.

6. In a molding machine, an oscillating frame having a'trunnion, a pair of co-acting wedge shaped collars fitted to one end ofthe trunnion, a roller bearing fitted to the other end of the trunnion, a journal bolted. to the main frame of the machine adapted to receive the trunnion, wedge shaped colend trunnion, a ball-thrustbearing between provided with a i a cylinderv carried by the oscillating the nut andtho journal, a frame fitted with a mold supporting platform and slidably connected with the oscillating frame, a pail of pressure arms pivoted to the oscillating frame, and means for actuating the mold supporting platform toward the swinging arms. whereby the swinging arms may clamp the cover plate upon the molds. v

'T. In a molding machine, an oscillating f'ame mounted upon trunnion bearing, pressure arms pivoted tothe frame, a frame provided with a flask supporting platform slidably mounted upon the oscillating frame, a cylinder carried by the oscillating frame; a piston, slidable in the cylinder. and connected with the frame of the flash supporting platform, a valve for manually controlling air under pressure, an automatically operated valve adapted to receive air under pressure from said manually operated valve for delivery to the cylinder, whereby a' preliminary jolting of the flask supporting platform maybe e'diected, said autom lcally operated valve being actuated through the movement of the frame of the flask supporting platform.

8. In a molding machine, an oscillating frame mounted upon a trunnion bearing, pressure arms pivoted to the fran1e,a frame lask supporting; platform slidably mounteduponthe oscillating rame, ramc,

piston connected withthe frame of the flask supporting platform and slidable in the cylinder, a valve for manually controlling air under pressure, an automatically operated valve adapted to receive air under pressure from said manually operated valve for delivery to the cylinder, said automatic valve comprising an air delivery port leading to the cylinder, a slidable plunger valve adapted to control thepassage of air from the air inlet portin, the valve chamber to the discharge port leading to the cylinder and theexhaust from the latter. an oscillating disc-valve for controlling the delivery from the inlet, port to actuate the fication in the presence of two witnesses.

GEORGE L. GRIMES.

lVitnesses: 1 I

S. E. THOMAS, Gnonen H. Lovnounsr.

to clamp the 

